Sometimes, some of the tests in org.jboss.tools.ws.jaxrs.core.internal.configuration.ProjectBuilderUtilsTestCase fail, and kicking another build fix the problem.
Eg: https://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/jbosstools-webservices_master/537/

Maybe we should refactor the test to avoid such problem ?